How to sharpen the drill bit of a pneumatic rib drill?

Sharpening the drill bit of a pneumatic rib drill is a crucial skill for anyone involved in mining and tunneling operations. As a leading supplier of Pneumatic Rib Drill and Column Supported Pneumatic Hand-held Drill, we understand the importance of maintaining the drill bits in optimal condition. In this blog, we will guide you through the process of sharpening the drill bit of a pneumatic rib drill, ensuring that you get the most out of your equipment.

Understanding the Importance of Sharpening Drill Bits

A sharp drill bit is essential for efficient and effective drilling operations. When a drill bit becomes dull, it requires more force to penetrate the material, leading to increased wear and tear on the drill and reduced drilling speed. Dull drill bits can also cause the drill to overheat, which can damage the bit and the drill itself. By regularly sharpening your drill bits, you can extend the lifespan of your equipment, improve drilling performance, and reduce the risk of costly breakdowns.

Tools and Materials Required for Sharpening

Before you begin sharpening the drill bit of your pneumatic rib drill, you will need to gather the necessary tools and materials. Here is a list of what you will need:

• Bench Grinder: A bench grinder is the most common tool used for sharpening drill bits. Make sure the grinder has a fine-grit wheel suitable for sharpening high-speed steel drill bits.
• Safety Gear: Wear safety glasses, gloves, and a dust mask to protect yourself from flying debris and dust.
• Marker: A marker can be used to mark the cutting edges of the drill bit for reference.
• Cooling Agent: You may need a cooling agent, such as water or cutting oil, to prevent the drill bit from overheating during the sharpening process.

Step-by-Step Guide to Sharpening the Drill Bit

Step 1: Inspect the Drill Bit

Before you start sharpening, carefully inspect the drill bit for any signs of damage or excessive wear. Look for chips, cracks, or uneven wear on the cutting edges. If the drill bit is severely damaged, it may need to be replaced rather than sharpened.

Step 2: Mark the Cutting Edges

Use a marker to mark the cutting edges of the drill bit. This will help you maintain the correct angle and symmetry during the sharpening process.

Step 3: Set the Grinder

Adjust the tool rest on the bench grinder to the correct angle. For most pneumatic rib drill bits, the optimal angle is between 59 and 60 degrees. Make sure the tool rest is secure and stable before you start sharpening.

Step 4: Start Sharpening

Hold the drill bit firmly against the tool rest and gently bring it into contact with the grinding wheel. Apply light pressure and move the drill bit back and forth across the wheel in a smooth, even motion. Make sure to maintain the correct angle throughout the sharpening process.

Step 5: Sharpen the First Cutting Edge

Start by sharpening one of the cutting edges of the drill bit. Focus on removing any dullness or burrs from the edge. Use the cooling agent as needed to prevent the drill bit from overheating.

Step 6: Sharpen the Second Cutting Edge

Once you have sharpened the first cutting edge, rotate the drill bit 180 degrees and sharpen the second cutting edge. Make sure to maintain the same angle and symmetry as the first edge.

Step 7: Check the Point Angle

After sharpening both cutting edges, check the point angle of the drill bit. The point angle should be between 118 and 120 degrees for most applications. If the point angle is too large or too small, you may need to adjust the sharpening angle accordingly.

Step 8: Deburr the Drill Bit

Use a deburring tool to remove any burrs or rough edges from the drill bit. This will help prevent the drill bit from snagging or causing damage during the drilling process.

Step 9: Clean and Test the Drill Bit

Once you have finished sharpening the drill bit, clean it thoroughly to remove any debris or grinding particles. Test the drill bit by using it to drill a small hole in a scrap piece of material. If the drill bit performs smoothly and efficiently, it is ready to be used in your pneumatic rib drill.

Tips for Maintaining Sharp Drill Bits

• Regular Inspection: Inspect your drill bits regularly for signs of wear and dullness. Replace any drill bits that are severely damaged or worn beyond repair.
• Proper Storage: Store your drill bits in a dry, clean place to prevent rust and corrosion. Use a drill bit holder or case to keep them organized and protected.
• Correct Speed and Feed Rate: Use the correct speed and feed rate for the material you are drilling. Using too high of a speed or feed rate can cause the drill bit to overheat and become dull more quickly.
• Lubrication: Use a lubricant or cutting oil when drilling to reduce friction and heat. This will help extend the lifespan of the drill bit and improve drilling performance.

Conclusion

Sharpening the drill bit of a pneumatic rib drill is a skill that can save you time and money in the long run. By following the steps outlined in this blog and maintaining your drill bits properly, you can ensure that your pneumatic rib drill performs at its best and lasts for many years.

If you have any questions about sharpening drill bits or need assistance with choosing the right pneumatic rib drill for your application, please don't hesitate to contact us. We are here to help you find the best solutions for your mining and tunneling needs.

 

 

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